Excel MT 144 p2 Formula: Avoid Data Validations 1 Rule Limit

Description:
See how to work around Data Validations one rule limit by creating a second shrinking list that looses values as they are used in the Data Validation area.
See how to ask questions at the Mr Excel Discussion Board and get answers.
See how to do two amazing tricks:
1) Using a formula, create a list of consecutive numbers that can skip rows and still keep counting with the functions IF, OR and LOOKUP
2) Create a contracting list of values using a formula with the IF, MAX, ROWS, INDEX and MATCH functions.